Pose method vs Chi method in running

https://sportsscientists.com/2007/10/pose-running-reduces-running-economy/

https://www.runtothefinish.com/running-form-chirunning-vs-pose-method/

http://crossfitslipstream.com/2018/04/08/its-easy-just-fall-my-experience-at-the-pose-running-clinic/

http://naturalrunningcenter.com/2013/07/30/posing-question-proper-running-form/